I noticed a lot of people with medals, sashes, and other fancy stuff... that doesn't look very accurate to me.
Its a dress parade, NCO and Officers can use sashes and white gloves. I wear white gloves to memorial service and this parade was a memorial service.
Now those medals, could be some civil war awards, I know several guys who wear period accurate award. Its really hard to tell from the distance of the film, another thing we could consider is that event gave out award like pins like they did for 150th Gburg, they gave us medallion to mark us "registered" many would just pin it on your coat but many others will stuff it in the pocket as well.
So its hard to tell from the distance but it could be farby or accurate.